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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file protocol/icmp.h
* @brief ICMP packet header
*/
#ifndef HICN_PROTOCOL_ICMP_H
#define HICN_PROTOCOL_ICMP_H
#include "../common.h"
/*
* The length of the ICMP header struct must be 4 bytes.
*/
#define EXPECTED_ICMP_HDRLEN 4
typedef struct
{
u8 type;
u8 code;
u16 csum;
} _icmp_header_t;
#define ICMP_HDRLEN sizeof(_icmp_header_t)
static_assert (EXPECTED_ICMP_HDRLEN == ICMP_HDRLEN,
"Size of ICMP struct does not match its expected size.");
/*
* The length of the ICMPWLDR header struct must be 4 bytes.
*/
#define EXPECTED_ICMPWLDR_HDRLEN 8
typedef struct
{
u8 type;
u8 code;
u16 csum;
union
{
struct
{
u16 id;
u16 sequence;
} echo; /* echo datagram */
u32 gateway; /* gateway address */
struct
{
u16 _unused;
u16 mtu;
} frag; /* path mtu discovery */
struct
{
u16 expected_lbl;
u16 received_lbl;
} wldr_notification_lbl;
};
} _icmp_wldr_header_t;
#define ICMPWLDR_HDRLEN sizeof(_icmp_wldr_header_t)
static_assert (EXPECTED_ICMPWLDR_HDRLEN == ICMPWLDR_HDRLEN,
"Size of ICMPWLDR struct does not match its expected size.");
#endif /* HICN_PROTOCOL_ICMP_H */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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